2D Scatterplot - Multiple

Unlike the regular scatterplot
in which one variable is represented by the horizontal axis and one by
the vertical axis, the multiple scatterplot consists of multiple plots
and represents multiple correlations: one variable (X) is represented
by the horizontal axis, and several variables (Y's) are plotted against
the vertical axis. A different point marker and color is used for each
of the multiple Y-variables and referenced in the legend so that individual
plots representing different variables can be discriminated in the graph.
The Multiple scatterplot is used
to compare images of several correlations by overlaying them in a single
graph that uses one common set of scales (e.g., to reveal the underlying
structure of factors or dimensions in Discriminant
Function Analysis).